plz someone help to do this one
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Step-by-step explanation:
r + 1/r=√3
(r + 1/r)³=(√3)³
r³+(1/r)³+3r.(1/r){r+1/r}=3√3
r³+(1/r)³+3(√3)=3√3
r³ + 1/r³ =3√3-3√3
r³+1/r³=0
thankyou
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